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Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # C44ER
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Custom Fit Vehicle Wiring

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-496-5010 to order CURT custom fit vehicle wiring part number C44ER or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (32)
  • Q & A (0)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C44ER

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily
    • Locate connection points behind the driver's-side and passenger's-side tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies and some interior paneling to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery. Once installation in complete, the 4-way connector will be stowed in an out-of-the-way location within your trunk.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.

Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.

Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.

Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.

Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.

56459 Curt T-Connector - Surface Mount Technology - 4 Wire

Installation Details C44ER Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C44ER

Average Customer Rating:  4.2 out of 5 stars   (32 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.

2021 Nissan Rogue

It would be really helpful if you had a video actually showing the installation on a Nissan Rogue. Also, many people have complained that the green wire is not long enough to reach the car battery under the hood. This has been a complaint for years, so why is this not rectified? Or why is it not able to be wired in the back like other wiring kits?

I agree, a video would be helpful. As for the green wire, the manufacturer wants you to route the wire exactly as the instructions say to without deviation so it should be the perfect length per the instructions.
-- Etrailer Expert Sierra K - 07/20/2022


Worked very well.. Some fishing of wires needed, but not hard, from tail lights to underside of rear


Looked everywhere for a 4 pin wire harness for my 2021 Nissan Rouge. Perfect fit, easy install took less than an hour fit to finish. Photos shows T-connectors separated and connected. Power was an easy run to the battery and ground was simply to chassis. I pulled the 4pin tail to the receiver… done! … First time installing any type of trailer wiring harness.

Nissan Rogue

Installed by dealership, works As advertised
Funny, Nissan dealer said there wasnt any wiring harness available yet (new Rogue) but you guys had one. Thanks. .


I've had it installed for 4 months now and all is working flawless as it should. No regrets! The only reason for 4 stars versus 5 is the length of wire where you tap into the taillight is a tad too short. I added a little length to the wires to make installation a bit easier. It can technically be done with the wire length provided but you are playing a game that needs small hands to pull it off and small hands I do not have.

2021 Nissan Rogue

This does fit the 2021 rouge but you will need to splice wires.The wire is to short 28" to the converter on the driver's side 56" to the converter on the passenger side.the problem is it is 24" down driver's side 60" across 24"back up on the passenger side. My math came up with 108" and they give you 84.
That being said l talked to curt all I got was an arrogant ass when I told them I just would like them to fix it for the next guy.
etrailer is aware of the problem but still chooses to sell the curt harness


Good stuff. Instructions were good.

2021 Nissan Rogue

The cable harness did not install as it was stated "It will fit" your vehicle. The right turn signal did not work, also the green lead wire was about 3 feet too short to connect to right tail lamp. The lamp connector lead wires were too short.
All in all a poor execution.

I apologize for the trouble you are having installing. This is a confirmed fit for your vehicle from the manufacturer. You do have to install exactly as it says, taking the simplest route, so that all wires fit.
-- Etrailer Expert Sierra K - 09/08/2021


Wires to short to do what instructions say


Decent harness. Would prefer if it had 2X the length to do in interior mount of the module and a down out and up connection.

Nissan Frontier

E-trailer is the best! Great sales people, unbelievable customer care. Got hitch 3 days early. I install hitches for a living , so I use them a lot.It is as easy as it looks to put most hitches on- Some only require you to lift up, start bolts and tighten- You can put a Frontier hitch on in 6 minutes! With wiring, 8 minutes! Some things don't require a professional!


I am employed at a local hitch installer, and we regularly order from etrailer. They're inventory is outstanding, as is their customer service and product offerings! From the do-it-yourselfer, to the professional hitch installer, etrailer is an outstanding resource!


Could not find Wiring Harness for my 2021 NISSAN ROUGE. THANK YOU etrailer. Installed it myself, works great.

2021 Nissan Rogue

Not exactly plug and play. If you want to install completely under the car Black box has to mount below driver side lamps for the wires to reach but then the green wire doesn't come anywhere close to reaching the passenger taillight. Had to cut and extend by about 3ft. Quick jobs turn into 2+ hours when you have to stop everything and run to the store for more wire. With a $xxx price tag you'd think a little more length would be figured into the design...


Great product only minor problem was the green wire is a little too short, had to insert a 15inch piece to make it fit right other then that it fit fine. works great


As soon as I can get the wire harness and hitch installed I will give you a further update I am hoping that this is going to work on my 2021 Rogue if it don't I'm probably going to ask to return it and try to get the right one


eTrailer never disappoints with their p roducts.


Appears to be the correct bundle. Will
it Thursday.

2021 Nissan Rogue

Doesn't fit.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 12/07/2021


I had a excellent experience with Customer service thank you Karren.


Great customer service! Easy install



2021 Nissan Rogue


Show More Reviews

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Install Instructions Link for Curt Trailer Wiring Harness # C44ER for 2021 Nissan Rogue
    While we don't have an install video for the Curt harness part # C44ER on a 2021 Nissan Rogue like yours I did attach an install instructions link to this page that shows the entire process walked through.
    view full answer...
  • Does Black Power Wire Of Curt T-Connector C44ER For 2021 Nissan Rouge Have To Be Run To The Battery?
    While it is definitely more work, the black 12v power wire of the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C44ER needs its own dedicated circuit and will need to be run to the positive terminal of the battery on your 2021 Nissan Rogue with the included in-line fuse. Not doing so will void the warranty of the harness, as there are no pre-run dedicated circuits on your Rouge. Instead of tearing into the interior of your Rouge I recommend running the...
    view full answer...
  • Running Power Wire of Trailer Wiring Kit Up to Battery of 2021 Nissan Rogue
    Since we don't have an install video for the harness you mentioned or one specifically on the power wire getting ran the best option we have would be for you to check out the help article I attached that covers this and use it as a guide.
    view full answer...
  • Instructions to Guide Install of Curt Trailer Wiring on 2021 Nissan Rogue SV
    We haven't had a chance to shoot an install video for the trailer wiring that fits your 2021 Nissan Rogue SV but I did attach a link to the install instructions for the Curt kit part # C44ER that fits your vehicle and each step is carefully detailed with pictures and diagrams to help.
    view full answer...
  • Is The Curt T-Connector Wiring Harness C44ER Confirmed To Fit All Models Of The 2021 Nissan Rogue?
    It sure is! I reached out to my contact at Curt and the Curt T-Connector Wiring Harness # C44ER you were looking at is confirmed to fit all models of the 2021 Nissan Rogue. Since you will be towing with your Rogue you will also need a ball mount, hitch ball, and hitch pin and clip. If you do not already have these I recommend getting the etrailer Ball Mount Kit # 989900 as it includes all of these components and a convenient carrying case. I included videos of the products mentioned...
    view full answer...
  • Availability Of 4-way Connector For 2021 Nissan Rouge
    I have another option for you, but the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM11143584 you were looking at is designed to fit a 2013-2021 Nissan NV200 and will not fit your 2021 Nissan Rouge. Instead I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C44ER as it is designed to fit your 2021 Nissan Rogue, and will not require any splicing into your factory wiring. I included a link to the written instructions...
    view full answer...
  • Does Curt Trailer Wiring for 2021 Nissan Rogue Require Extending Wires
    You are correct that to install the Curt trailer wiring harness # C44ER on your 2021 Nissan Rogue you do not have to take the interior trim completely out. I did see the review from James where he said he didn't have enough wire which is confusing since we have had other customers who installed this not report the same issue so I'd assume he may have done something different. In general I like to recommend the Tekonsha kits like the part # TK76FR over the Curt harnesses as we have found...
    view full answer...
  • Trailer Hitch Receiver And Vehicle Harness Recommendations For a 2021 Nissan Rogue SV
    I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver # DT85MR for your 2021 Nissan Rogue SV. I have linked an video of the installation we did installing this receiver on a 2021 Nissan Rogue SV so that you can see the fitment for reference. The receiver is rated for 525lbs of tongue weight and 3,500lbs trailer weight. I recommend installing a Curt T-Connector Vehicle Wiring Harness # C44ER to give you a 4-way flat connector. With this connector you can add Auxiliary Lights # C53201...
    view full answer...
  • Trailer Hitch Receiver And Wiring That Fits 2021 Nissan Rogue
    The Nissan Rogue underwent a design change model refresh for the 2021 model year, so a hitch and wiring can't be swapped from the 2018 model. So what you will need for a '21 Rogue is a new hitch and wiring that fits, and the best options are the following: - Draw-Tite Max-Frame Trailer Hitch Receiver # DT85MR - Curt T-Connector Vehicle Wiring Harness # C44ER I really like the Draw-Tite because it has a nice concealed look that helps your Rogue maintain its streamlined look; I have added...
    view full answer...
    Image 1 for
  • Class III Trailer Hitch and Wiring for 2021 Nissan Rogue Plus 4-Way Mounting Bracket Solution
    For your 2021 Nissan Rogue AWD SL model we do have the Curt Class III hitch part # C24HR does hug closely to the lower rear bumper area. Since this hitch only has the hitch opening hanging below the rear bumper and hugs so closely there isn't a good place to mount a 4-way bracket like for the 4-way harness # C44ER that fits your vehicle. So your best option would be to mount the part # 18144 to your rear bumper instead. This also allows you to put the bracket in more places to make it...
    view full answer...
  • Recommended Hitch for 2021 Nissan Rogue SV
    The Draw-Tite Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" # DT23MR is confirmed to fit all 2021 Nissan Rogue models, including your SV. Unless you specifically want a 1-1/4" hitch, I recommend the # DT85MR Draw-Tite Max-Frame Class III 2" hitch instead. The 2" receiver is the most common size, and you will gain an additional 225 lbs of tongue weight capacity. I also recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C44ER if you plan...
    view full answer...
  • Install Video for Trailer Hitch that Fits 2021 Nissan Rogue SV
    We did have the chance to shoot an install video for the Draw Tite trailer hitch part # DT85MR which fits your 2021 Nissan Rogue. Since all of the hitches for your vehicle are pretty similar you could use this as a guide for the install of any of the other hitches we offer. I also attached install instructions for the Tekonsha wiring part # TK76FR which is very similar to the Curt for you to check out as well. Maybe you'll find those easier to follow.
    view full answer...
  • Is a Class III Hitch Available for 2021 Nissan Rogue
    The Draw-Tite Class III hitch, part # DT85MR is indeed now available. The hitch is a confirmed fit for the 2021 Nissan Rogue. If you'll be using the hitch for towing, you'll also need a ball mount like # D-28, a hitch pin like # PC3, a trailer wiring harness like # C44ER and a trailer ball. For a 1-7/8 inch ball, use # 19260 or # 63845 for a 2 inch ball. I've linked to an install video for the hitch, as well as to installation instructions for the hitch and the trailer wiring harness.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S
Employee Michael B
Installed by:
Michael B

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